46results about How to "The preparation method is simple and effective" patented technology

The invention relates to an anti-bending multimode fiber and manufacturing method thereof. The fiber comprises a core and a cladding and is characterized in that the radius of core R1 is 24-26 microns, refractive index section of the core is like a parabola, refractivity maximum delta1 is 0.9-1.1%, the cladding outside the core is composed of three parts, the radius of inner cladding R2 is 1.04-1.6 times of the radius of core R1, delta2 is minus 0.01-0.01%, intermediate cladding is gradually changed in refractive index, the radius of intermediate cladding R3 is 1.06-1.8 times of R1, refractivity is gradually changed into delta4 from delta2, the radius of outer cladding R4 is 2.38-2.63 times of R1, and delta4 is minus 0.20% to minus 0.40%. The invention reduces fiber bending additional attenuation and improves anti-bending performance of fiber but also basically eliminates inner stress of fiber, greatly improves mechanical properties of fiber, and service life of fiber operating in minor radius for a long time also can be guaranteed. The manufacturing method of the invention is simple, convenient and effective and is applicable to mass production.

The invention discloses a method of using a solution atomization method to prepare superfine Sb oxide. The method comprises the following steps: (1) trivalent Sb is added into a hydrochlric solution to prepare a Sb solution with the molar concentration of 0.05-0.8 mol / L; (2) clean oxidant is used to oxidize the solution obtained in step (1), and a pentavalent Sb solution is obtained; (3) Sb oxide powder is obtained after spray pyrolysis of the pentavalent Sb solution is obtained in step (2). According to the invention, trivalent Sb solution is used as a raw material, superfine Sb oxide powder materials are directly prepared through oxidization and spray pyrolysis, and the technological process is simple. Alternatively, lixivium from the conventional process of using an acid method in antimony smelting is directly used as the raw material. Therefore, the process of preparing the superfine Sb oxide powder materials is shortened; the conventional metallurgical process and the material preparation process are effectively combined; added value of products from conventional non-ferrous metal metallurgy is significantly increased; recycling of hydrochloric acid from lixivium is realized.

The invention relates to a bend-resistance multimode optical fiber, comprising a core layer and cladding layers. The bend-resistance multimode optical fiber is characterized in that the radius R1 of the core layer is 23-27 microns, the refractive index section of the core layer is a parabola, and the cladding layers outside the core layer successively comprise an inner cladding layer, a sunken ring, a rising ring and a sunken outer cladding layer; the thickness W2 of the single edge of the inner cladding layer is 0-2.5 microns, and the relative refractivity delta 2 of the inner cladding layer is -0.1% to 0.1%; the thickness W3 of the single edge of the sunken ring is 0.5-6 microns, and the minimum relative refractivity delta 3 min of the sunken ring is from -0.1% to -0.3%; the thickness W4 of the single edge of the rising ring is 0.5-10 microns, and the rising ring is a pure silica layer; the thickness W5 of the signal edge of the sunken outer cladding layer is 17-39 microns, and the minimum relative refractivity delta 5 min of the sunken outer cladding layer is from -0.15% to -0.6%; and delta 3 min is larger than delta 5 min. The bend-resistance multimode optical fiber has the characteristics of extremely low macro-bending additional attenuation, has the identical macro-bending property at dual-communication windows (850nm and 1300nm) and macro-bending flat feature; and the refractive index of the sunken ring is higher than that of the sunken outer cladding layer in the optical fibre cladding layer, and the band width of the bending-insensitive multimode optical fiber can be effectively improved.

The invention disclose test paper for detecting trace elements. The test paper is spliced by routine urine test paper, test paper for detecting calcium elements, test paper for detecting iron elements and test paper for detecting zinc elements, and each color identification block corresponds to the detection result of each test paper. By the test paper for detecting the trace elements, whether the routine urine test items and content of trace elements such as the calcium elements, the iron elements and the zinc elements in the urine of a child are normal or not can be detected conveniently. A production method of the test paper for detecting the trace elements is simple and effective, and the disposable test paper is low in use cost, convenient to use and fast and accurate in detection result.

A LED package structure is disclosed. The LED package structure includes a substrate, a light emitting diode, a plasma chemical vapor deposition layer and a transparent material layer, wherein the substrate has a plurality of contacts. The light emitting diode is disposed on the substrate and electrically contacted to the contacts. The plasma chemical vapor deposition layer is disposed on the light emitting diode and the refractive index of the plasma chemical vapor deposition layer is smaller than that of the light emitting diode. The transparent material layer is disposed on the plasma chemical vapor deposition layer and the refractive index of the transparent material layer is smaller than that of the plasma chemical vapor deposition layer.

The invention relates to a composite lysozyme oral spray. The oral spray is characterized by comprising the following components in percentage by weight: 3-7 percent of lysostaphin, 20-25 percent of lysozyme, 0.02-0.4 percent of tea polyphenol, 1.5-5 percent of olive oil, 1-10 percent of vitamin C, 1-3 percent of sorbitol, 0.8-2 percent of lecithin, 0.01-0.07 percent of xanthan gum, and the balance of purified water. The oral spray is remarkable in effects and convenient to use, and does not contain alcohol; all components are extracted from natural products, and enable fresh breath and no toxic or side effect in the action of compatibility of composite lysozyme, tea polyphenol and vitamin C. The composite lysozyme oral spray has good preventing and treating effects on dental ulcer, decayed teeth, aphtha, halitosis, glossitis, sphagitis and other oral diseases; the preparation method is concise and effective and low in cost, and the prepared composite lysozyme oral spray is good in stability.

The invention relates to an anti-bending multimode fiber and manufacturing method thereof. The fiber comprises a core and a cladding and is characterized in that the radius of core R1 is 24-26 microns, refractive index section of the core is like a parabola, refractivity maximum delta1 is 0.9-1.1%, the cladding outside the core is composed of three parts, the radius of inner cladding R2 is 1.04-1.6 times of the radius of core R1, delta2 is minus 0.01-0.01%, intermediate cladding is gradually changed in refractive index, the radius of intermediate cladding R3 is 1.06-1.8 times of R1, refractivity is gradually changed into delta4 from delta2, the radius of outer cladding R4 is 2.38-2.63 times of R1, and delta4 is minus 0.20% to minus 0.40%. The invention reduces fiber bending additional attenuation and improves anti-bending performance of fiber but also basically eliminates inner stress of fiber, greatly improves mechanical properties of fiber, and service life of fiber operating in minor radius for a long time also can be guaranteed. The manufacturing method of the invention is simple, convenient and effective and is applicable to mass production.

The process of preparing aluminum chloride polymer as water purifier with kaolin mineral includes drying kaolin mineral, calcinations at 600-750 deg.c, adding water to compound slurry, ageing, centrifugally separating, reacting in a reactor at 85-95 deg.c for 3 hr, centrifugally treating reaction product, concentrating filtrate to obtain liquid purifier or spray drying to obtain solid purifier, and treating filter residue through secondary eliminating impurity, centrifugal treating and drying to obtain white carbon black as excellent stuffing. The preparation process has aluminum utilization up to 95 %, and the water purifier has average grain size smaller than 40 nm, high water treating effect, high sludge depositing speed and low production cost.

The invention relates to a heat reversible crosslinking polyvinyl chloride (PVC) cable material and a preparation method thereof. The PVC cable material is prepared by the following components by weight: 100 parts of PVC resin, 2-4 parts of stabilizer, 10-40 parts of plasticizer, 10-50 parts of inorganic filler, 0.5 part to 5 parts of heat reversible crosslinking agent, 0.5 part to 2 parts of lubricant, 0.2 part to 2 parts of antioxidant and 10-30 parts of fire retardant. The preparation method of the PVC cable material includes process steps such as dosing, high speed blending, extrusion pelleting and drying. Compared with the prior art, the cable material has the advantages of adopting a special crosslinking agent capable of generating heat reversible crosslinking to be blended with PVC, utilizing active chlorine on a PVC chain to react to trigger covalence crosslinking of the PVC, improving heat stability and heat resistance of a PVC cable and maintaining prior thermal plasticity.

The invention discloses a method of using a solution atomization method to prepare superfine Sb oxide. The method comprises the following steps: (1) trivalent Sb is added into a hydrochlric solution to prepare a Sb solution with the molar concentration of 0.05-0.8 mol / L; (2) clean oxidant is used to oxidize the solution obtained in step (1), and a pentavalent Sb solution is obtained; (3) Sb oxide powder is obtained after spray pyrolysis of the pentavalent Sb solution is obtained in step (2). According to the invention, trivalent Sb solution is used as a raw material, superfine Sb oxide powder materials are directly prepared through oxidization and spray pyrolysis, and the technological process is simple. Alternatively, lixivium from the conventional process of using an acid method in antimony smelting is directly used as the raw material. Therefore, the process of preparing the superfine Sb oxide powder materials is shortened; the conventional metallurgical process and the material preparation process are effectively combined; added value of products from conventional non-ferrous metal metallurgy is significantly increased; recycling of hydrochloric acid from lixivium is realized.

The invention relates to a bending-resistant multi-mode fiber used in an access network or a miniature optical device. The bending-resistant multi-mode fiber comprises an optical fiber and a coating coated on the outer surface of the optical fiber, wherein the fiber consists of a quartz glass core layer which has a section structure with a parabolic shape or step-type refraction index and a quartz glass cladding which surrounds the core layer. The optical fiber is characterized in that: the core layer has a diameter of between 20 and 200 mu m and consists of a germanium-and-fluorine-doped quartz glass material; and double solidified polymer coatings are coated out of the cladding, wherein an inner coating coated on the outer surface of the cladding is a low-refraction index flexible polymer coating while an outer coating is a high-Young's modulus polymer coating. Because of the design of the low-refraction index inner coating, an internal stress of the optical fiber is avoided, the mechanical performance of the optical fiber is greatly improved, and the use performance and the service life of the optical fiber working in a small-radius bending state are ensured. The bending-resistant multi-mode fiber has high bending-resistant performance; and at a wavelength of 850 nm, the additional attenuation of the bending caused by winding 1 circle with a bending radius of 10 mm is less than or equal to 0.15 dB. The bending-resistant multi-mode fiber has the characteristic of simple, convenient and effective manufacturing method, and is suitable for large-scale production.

The invention relates to a seven-core small-diameter single mode fiber. The seven-core small-diameter single mode fiber comprises seven single-mode fibers having the same core cladding structure, wherein the seven fibers combined together closely, one fiber located at the center of the fibers, and the other six fibers surround the periphery of the center fiber; the single-mode fiber comprises a core layer and a cladding layer, the cladding layer comprises an inner cladding layer, a sunken cladding layer and an external cladding layer from the inside to the outside, radius r4 of the external cladding layer is 20-25 microns, ratio r4 / r1 of the radius of the external cladding layer to the radius of the core layer is 5.1-5.5, ratio r4 / r2 of the radius of the external cladding layer to the radius of the inner cladding layer is 2.4-2.8, and ratio r4 / r3 of the radius of the external cladding layer to the radius of the sunken cladding layer is 1.6-2.0. With the fiber provided by the invention,external diameter of the multi-core fiber is reduced greatly, and communication capacity density of unit cross section of the fiber is improved remarkably; consequently, space resource for paving pipelines is reduced; meanwhile, signal crosstalk influence among different fiber units is eliminated. The fiber provided by the invention has excellent comprehensive performance parameters, such as wavelength, mode field, attenuation and chromatic dispersion, in application wavebands, has microbending loss which is small enough. The fiber provided by the invention can be produced through a simple and convenient manufacturing method and needs low manufacturing cost.